Here is how to install PlayOnLinux on Centos 7.

First, install the repo:

sudo wget -O /etc/yum.repos.d/playonlinux.repo http://rpm.playonlinux.com/playonlinux.repo

Now install PlayOnLinux with yum.

sudo yum install playonlinux

After installation, PlayOnLinux will likely complain that it cannot find 32-bit OpenGL libraries. To fix this problem, install the following packages:

sudo yum install mesa-dri-drivers.i686 mesa-libGL.i686 mesa-libGLU.i686

Done. Now you should be able to run 32-bit software. Be sure to check your available WINE versions and install accordingly.